Lucifer Curves tells the stranger-than-fiction true story of how preschool lead poisoning has caused crime waves across centuries and around the world. Lead poisoning also explains USA racial disparities in education, abortion and unwed birth rates, and arrest and incarceration rates. Rick Nevin's peer-reviewed research on this subject is updated with figures showing how lead exposure trends have accurately predicted ongoing crime trends in the USA, Canada, Britain, Australia, and New Zealand. Lucifer Curves also presents new pieces of this puzzle, showing how lead poisoning can explain the "dawn to dusk of delinquency" and historic trends in stature known as the "antebellum puzzle". Other figures show that lead poisoning has also predicted USA trends in education and unwed teen pregnancy. Nevin presents clear evidence that lead poisoning has caused these societal trends, in terms accessible to anyone with a curious mind, based on causation indicators that the World Health Organization has described as a “mainstay of epidemiological textbooks and data interpretation”. Nevin also explains how preschool lead exposure still poses an important public health risk, how we can economically eliminate the greatest source of that risk, and how the legacy of lead poisoning has profound implications for current policy debates over criminal justice reform and the death penalty.